Methyl violet 6B C.I. 42555 is a high-quality biological stain used in a range of laboratory applications. Its CAS number is 632-99-5, and its molecular weight is 393.93 g/mol.
 
The GHS hazard warning codes for this product include H302 (harmful if swallowed), H312 (harmful in contact with skin), and H315 (causes skin irritation). 
 
Methyl violet 6B is commonly used to stain biological specimens, including bacteria and plant tissues, for microscopic examination. It is also used in the textile industry to dye silk and wool.